In this article the ability of ultrahigh resolution ophthalmic optical coherence tomography (OCT) to image small choroidal blood vessels below the highly reflective and absorbing retinal pigment epithelium is demonstrated for the first time. A new light source (λc=1050 nm, Δλ=165 nm, Pout=10 mW), based on a photonic crystal fiber pumped by a compact, self-starting Ti:Al2O3 laser has therefore been developed. Ex-vivo ultrahigh resolution OCT images of freshly excised pig retinas acquired with this light source demonstrate enhanced penetration into the choroid and better visualization of choroidal vessels as compared to tomograms acquired with a state-of-the art Ti:Al2O3 laser (Femtolasers Compact Pro, λc=780 nm, Δλ=160 nm, Pout=400 mW), normally used in clinical studies for in vivo ultrahigh resolution ophthalmic OCT imaging. These results were also compared with retinal tomograms acquired with a novel, spectrally broadened fiber laser (MenloSystems, λc=1350 nm, Δλ=470 nm, Pout=4 mW) ...
Figs. 1A - 1C illustrate a series of images from an inspection system designed to read a barcode beneath a cellophane wrapper. The image in Fig. 1A was generated using a Coaxial Diffuse Light, which is clearly ineffective for reading the bar code because of the specular reflections. Fig. 1B illustrates the results of applying a Low Angle Dark Field Ring Light; the image is more consistently free of specular wrapper reflections, so the lighting solution could be considered adequate. However, because we have not completely removed the specular reflection, there is still potential for the next part to have an obscured code due to a particularly strong fold in the cellophane wrap. The image in Fig. 1C shows the same part free of specular reflection, and is thus not only adequate, but is in fact more robust. Fig. 1D shows the Broad Area Linear Array Light and its geometry applied to generate the image in Fig. 1C. ...
Beryllium coatings with varying thicknesses and columnar grain sizes were deposited by low temperature magnetron sputtering and wet chemically etched to enhance diffuse absorption of light. After etching these coatings exhibited a matte black surface finish and low specular reflectance (below 2%) in the IR up to a critical wavelength dependent upon the original grain size of the coating. Extremely thick coatings (350 µm) with original grain sizes of 10 to 12 µm were produced which exhibited specular reflectances below 0.5% up to 50 µm wavelength and a Lambertian BRDF at 10.6 µm averaging 4.3x10-3 ster-1. Scanning electron micrographs are presented for etched and unetched beryllium coatings which showed the etching process produces roughness and porosity over several size scales simultaneously with the maximum size scale limited by the initial coating grain size and thickness. This technique for producing diffuse absorbing baffle materials has great versatility in choice of coating material and
AIMS Slit lamp fundus biomicroscopy allows for high magnification, stereoscopic diagnosis, and treatment of macular diseases. Variable contrast, narrow field of view, and specular reflections arising from the cornea, sclera, and examining lens reduce image quality; these images are of limited clinical utility for diagnosis, treatment planning, and photodocumentation when compared with fundus camera images. Algorithms are being developed to segment fundus imagery from slit lamp biomicroscopic video image sequences in order to improve clinical utility.. METHODS Video fundus image sequences of human volunteers were acquired with a video equipped, Nikon NS-1V slit lamp biomicroscope. Custom developed software identified specular reflections based on brightness and colour content, and extracted the illuminated fundus image based on colour image analysis and size constraints.. RESULTS In five subjects with variable image quality, the approach allowed for automatic, robust, accurate extraction of that ...
Globally, several shortcomings of dental resin based composites (RBCs) remain. This may be related to problems associated with incomplete conversion (40-70%), polymerisation shrinkage (1-4% by volume) and the stress generated at the tooth/restoration interface. Additionally, the increased number of technique sensitive incremental steps required to fill relatively large cavities is due to inefficient light transmission at depths greater than 2mm. The current investigation demonstrates the applicability of the exposure reciprocity law in photoactive dental materials in order to try and improve these shortcomings. The development techniques that will allow dynamic monitoring of optical and physical change will aid material development with the goal of improving cure depths. The current investigation has demonstrated the use of several analytical techniques (FT-IR spectroscopy, UV-Vis Spectroscopy and low coherence interferometry) and shown the complexity of optical phenomena within RBCs, which are ...
We report a versatile imaging system combining scanning laser ophthalmoscopy (SLO) and T-scan based en face ultrahigh resolution optical coherence tomography (OCT). The image carrier is generated using the optical path difference modulation introduced by the X-Y galvo-scanner mirrors specific to en face OCT (without optical modulators in the reference arm). The light source is a compact superluminescent diode based source with 150 nm FWHM spectrum, centered at 890 nm. We demonstrate en face B-scan and C-scan ultrahigh resolution OCT imaging of the human retina in vivo, with an axial resolution of 3.2 μm in tissue. The system is capable of acquiring large lateral size ultrahigh resolution OCT scans of a maximum field size of 20°. The acquisition speed is up to 2 frames/s for both OCT B-scans and C-scans. The measured system sensitivity is more than 98 dB, for a power level to the target of 1 mW and maximum lateral scan size. The C-scans are, to the best of our knowledge, the first and the ...
A nonlinear dielectric material is incorporated within a photonic crystal as a means of changing the refractive index of a defect. In this way, the resonant frequency can be easily adjusted, after fabrication, by external mechanisms (either optical or electronic). The ability to tune the frequency of a resonant mode is useful for constructing photonic integrated devices, thus the invention enables the use of a photonic-crystal microcavity for such purposes. In one embodiment there is provided a photonic crystal having a periodic dielectric structure, and a defect positioned within the structure to define a microcavity. The defect includes a nonlinear material and being adapted to have an induced variation in index of refraction so as to tune the resonant mode of the microcavity.
In a spectrograph / detector array system, stray light can be a more significant problem than it is with scanning monochromators. The array is a much larger target for stray radiation; there is no exit slit to limit the field of view for the detector. Some signal is reflected back off the array where it is scattered as stray light, and the array itself typically has less dynamic range than single element detectors.. It is difficult to characterize the stray light behavior of spectrographs. As with monochromators, variation in spectral content of your source, grating choice, and type of signal, contribute to stray light. The structure and choice of array, wavelength region, and internal specular reflections add to this changing picture for spectrographs.. All Oriel Spectrographs are designed for low stray light. The Oriel MS260i™, MS125 and MS257™ spectrographs conform to design rules that eliminate re-entrant spectra. Re-entrant spectra are due to diffracted radiation being reflected off the ...
Endoscopic artifacts are a core challenge in facilitating the diagnosis and treatment of diseases in hollow organs. Precise detection of specific artifacts like pixel saturations, motion blur, specular reflections, bubbles and debris is essential for high-quality frame restoration and is crucial for realizing reliable computer-assisted tools for improved patient care. At present most videos in endoscopy are currently not analyzed due to the abundant presence of multi-class artifacts in video frames. Through the endoscopic artifact detection (EAD 2019) challenge, we address this key bottleneck problem by solving the accurate identification and localization of endoscopic frame artifacts to enable further key quantitative analysis of unusable video frames such as mosaicking and 3D reconstruction which is crucial for delivering improved patient care. This paper summarizes the challenge tasks and describes the dataset and evaluation criteria established in the EAD 2019 challenge.
A free-base porphyrin dye, 4-(5-carboxyphenyl)-10,15,20-tritolylporphyrin (TTPa) formed well-behaved monomolecular films at the air-water interface. The carboxylic acid was the hydrophilic portion, and became ionized at subphase pH | 7.3.;The presence of two or more two-dimensional crystalline phases in these films on the aqueous surface under certain conditions was inferred from the observation of visible, inhomogeneous specular reflection from the films.;A spectroscopic study of Langmuir-Blodgett monolayers indicated three different species existed in the films as a function of the pH to which the subphase was buffered. One species was assigned as the monomer; the others as aggregates. One of the aggregates exhibited an unusual absorption spectrum and was postulated to exist in an environment where motion was restricted.;Langmuir-Blodgett films transferred from buffer-free water underwent a rapid reorganization; after 24 hours the absorption spectrum resembled that of a thin sublimed film. These
We have used x-ray specular reflection to study the structure of the air-liquid-crystal interface of the lyotropic liquid crystal formed from binary mixtures of cesium perfluoro-octanoate (CsPFO) and water. In the isotropic phase the surface is coated with a monolayer of CsPFO separated by layers of water from one or more smectic bilayers of CsPFO. As for the case of thermotropic liquid crystals, the isotropic-to-nematic phase transition has no effect on the surface structure, and as the temperature is lowered towards the nematic-to-smectic-A transition temperature, the number of surface-induced smectic layers increases dramatically (e.g., approximately 100 layers were observed). Theoretical modeling of the reflectivity excludes the possibility that the surface bilayers are arrays of micelles. X-ray scattering from critical smectic short-range order in the bulk, studied by tuning the spectrometer away from the specular condition, indicates that the scattering is fundamentally different from ...
The term Fermi point has two applications but refers to the same phenomena (special relativity): Fermi point (Quantum Field Theory) Fermi point (Nanotechnology) For both applications count that the symmetry between particles and anti-particles in weak interactions is violated: At this point the particle energy E = cp is zero. In nanotechnology this concept can be applied to electron behavior. An electron when as single particle is a Fermion obeying the Pauli exclusion principle. Fermionic systems that have a Fermi surface (FS) belong to a universality class in quantum field theory. Any collection of fermions with weak repulsive interactions belongs to this class. At the fermi point, the break of symmetry can be explained by assuming a vortex or singularity will appear as a result of the spin of a fermi particle (quasiparticle, Fermion) in one dimension of the three-dimensional momentum space. The Fermi point is one particular electron state. The Fermi point refers to an event chirality of ...
Fourier analysis. Fourier analysis of daily visit totals reveals strong weekly and yearly periodicities. Power is shown on the Y axis with frequency (1/day) sho
A new ultrafast Diffuse Optical Tomography (DOT) has been developed for real time in vivo brain metabolism monitoring in songbird. The technique is based on space resolved time of flight measurements of the photons across the brain tissues. A three dimensional reconstruction of the brain activity is foreseeable by means of a double space and time sampling of the reflectance signal. The setup and the treatment procedure are described in depth and promising preliminary results showing the response of brain tissues to hypercapnia stimulations (increase of CO2) are presented ...
Y. Zhan, A. T. Eggebrecht, J. P. Culver, and H. Dehghani, Spectrally constrained functional diffuse optical tomography of the adult brain, in Biomedical Optics and 3-D Imaging, OSA Technical Digest (Optical Society of America, 2012), paper JM3A.68 ...
Diffuse Optical Tomography (DOT) An extension of fNIRS that give the Gowerlabs NTS Optical Imaging System its 3D imaging capability.
Fourier Analysis Shareware and Freeware Programs - Fourier Analysis Program (compadre.org), Fourier Transform Lab Student Edition (JCrystalSoft), Embeddable C C++ interpreter Ch Standard Edition (SoftIntegration, Inc) ...
www.MOLUNA.de Dihedral Fourier Analysis [4198785] - Dihedral Fourier Analysis introduces the theory and applications necessary to study experimental data indexed by, or associated with, the points in a dihedral symmetry orbit.nThis book looks at experimental data and analytical models indexed by certain dihedral rotations and reversals realized as vector fields. Its particular relevance as a research
which are AGNs that were found to dominate the gamma-ray sky by the Compton Gamma Ray Observatory, the forerunner to Fermi. Since blazars are highly variable on very short time scales (days or shorter) at all accessible wavelengths, it is important that supporting observations be obtained for these AGNs across the electromagnetic spectrum throughout the Fermi mission. Such observations will place the observed gamma-ray behavior of these extreme objects in context with the variability of the continuum at lower energies. Only through this multi-wavelength approach can a comprehensive understanding of the source structure and nonthermal emission mechanisms in blazars emerge. To help realize this goal, Steward Observatory of the University of Arizona will continue to contribute optical data for the LAT-monitored blazars and Fermi Targets of Opportunity (ToOs) during years 8--10 of its mission as part of the Cycle 8 Guest Investigator Program. As it has since the launch of Fermi, the primary ...
OPOD, Optics Picture of the Day, OpticsPOD, Featured images of optical phenomena in the atmosphere, rainbows, halos, corona, glories, rays, shadows and more.
OPOD, Optics Picture of the Day, OpticsPOD, Featured images of optical phenomena in the atmosphere, rainbows, halos, corona, glories, rays, shadows and more.
A Fermi National Accelerator Laboratory FERMILAB Pub-95022-E CDF Observation of Top Quark Production in pp Collisions F Abe et al The CDF Collaboration Fermi National Accelerator…
UCL Discovery is UCLs open access repository, showcasing and providing access to UCL research outputs from all UCL disciplines.
UCL Discovery is UCLs open access repository, showcasing and providing access to UCL research outputs from all UCL disciplines.
The Lens serves almost all the patents and scholarly work in the world as a free, open and secure digital public good, with user privacy a paramount focus.
The Large Area Telescope (LAT) one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed an increasing gamma-ray flux from a source positionally consistent with 3C 454.3 (J2000, RA: 22:53:57.748, Dec: +16:08:53.56, Fey et al. 2004, AJ, 127, 3587). Preliminary analysis indicates that the source on September 15th, 2009, has brightened to a high state with an average gamma-ray flux over the day (E>100MeV) of 6.0 ± 0.6 (statistical only) à 10−6 ph cm−2 s−1 and peaking at 7.2 ± 1.2 (statistical only) à 10−6 ph cm−2 s−1 in the 6 hour period between 6 and 12 UT of September 15th. In recent weeks optical, IR and mm flares have been observed from this source (ATEL #2181; ATEL #2155; ATEL #2150). This is the second time that Fermi has reported activity for this blazar (ATEL #1628, 24 July 2008).. The LAT has also observed an increasing gamma-ray flux from a source positionally consistent with 3C 273 (J2000, R.A.: 12:29:06.700, Dec: +02:03:08.60 Johnston et al. ...
The vested gain is any positive index change for the term (but not exceeding the cap set for that term), multiplied by the applicable vesting factor for that day, and then multiplied by the remaining investment base for the current term. Please see the Product Overview for vesting factors ...
Anglesite optical properties like luster, clarity, refractive index etc. are used to determine the non-destructive methods during gemstone identification.
Intertek optical microscopy labs are staffed with microscopy scientists with years of experience in research and production problem-solving for problems, materials and clients.
22pRG-2 ボース・アインシュタイン凝縮体における粒子生成 : 曲がった時空上の場の量子論とのアナロジー(量子エレクトロニクス(Bose原子系・Fermi原子系の理論),領域1,原子・分子,量子エレクトロニクス,放射線物理 ...
Futsuhara, M.; Yoshioka, K.; Takai, O. (1998). Structural, electrical and optical properties of zinc nitride thin films prepared by reactive RF magnetron sputtering. Thin Solid Films (எல்செவியர்) 322 (1): 274-281. doi:10.1016/S0040-6090(97)00910-3. Bibcode: 1998TSF...322..274F. ...
This program, entitled Advanced Technologies for Structural and Functional Optical Coherence Tomography, is a collaborative effort between investigators at the Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics; Dr. David Boas, Associate Professor in Radiology, Harvard Medical School at the Massachusetts General Hospital, Martinos Center for Biomedical Imaging; and Dr. Jay Duker, Director, New England Eye Center, Professor and Chair of Ophthalmology, Tufts University School of Medicine. The objective of this program is to develop and apply advanced optical coherence tomography (OCT) technologies for ultrahigh resolution and functional imaging in biomedical applications.
Witt, M. and Koch, B. (2007): Characterization of fulvic and humic acids from different locations by ultrahigh resolution mass spectrometry , 55th ASMS Conference on Mass Spectrometry, 03-07 Jun, 2007 Indianapolis, USA ...
The Handbook of Biomedical Nonlinear Optical Microscopy provides comprehensive treatment of the theories, techniques, and biomedical applications of nonlinear optics and microscopy for cell biologists, life scientists, biomedical engineers, and clinicians. The chapters are separated into basic and advanced sections, and provide both textual and graphical illustrations of all key concepts.
The color of a cloud, as seen from the Earth, tells much about what is going on inside the cloud. Dense deep tropospheric clouds exhibit a high reflectance (70% to 95%) throughout the visible spectrum. Tiny particles of water are densely packed and sunlight cannot penetrate far into the cloud before it is reflected out, giving a cloud its characteristic white color, especially when viewed from the top.[18] Cloud droplets tend to scatter light efficiently, so that the intensity of the solar radiation decreases with depth into the gases. As a result, the cloud base can vary from a very light to very dark grey depending on the clouds thickness and how much light is being reflected or transmitted back to the observer. Thin clouds may look white or appear to have acquired the color of their environment or background. High tropospheric and non-tropospheric clouds appear mostly white if composed entirely of ice crystals and/or supercooled water droplets. As a tropospheric cloud matures, the dense ...
TY - JOUR. T1 - Magnetic resonance imaging appropriate for construction of subject-specific head models for diffuse optical tomography. AU - Kurihara, Kazuki. AU - Kawaguchi, Hiroshi. AU - Obata, Takayuki. AU - Ito, Hiroshi. AU - Okada, Eiji. PY - 2015. Y1 - 2015. N2 - Subject-specific head models of which their geometry is based on structural magnetic resonance images are essential to accurately estimate the spatial sensitivity profiles for image reconstruction in diffuse optical tomography. T1-weighted magnetic resonance images, which are commonly used for structural imaging, are not sufficient for the thresholdbased segmentation of the superficial tissues. Two types of pulse sequences, which provide a high contrast among the superficial tissues, are introduced to complement the segmentation to construct the subject-specific head models. The magnetic resonance images acquired by the proposed pulse sequences are robust to the threshold level and adequate for the thresholdbased segmentation of ...
2013. ABSTRACT: Surface traveling waves consist of electromagnetic energy where the propagation of that energy is exactly parallel or grazing to the plane of the surface. This is in contrast to the phenomena of specular reflection, where incident energy is at some other angle besides grazing and the surface than reflects the incident energy into a complimentary angle determined by Snells law. While sensors exist to determine specular performance on aircraft, currently a useful field inspection capability to assess coating performance for traveling wave does not. Compass Technology Group (CTG) proposes to develop a new concept in microwave nondestructive evaluation (NDE) of specialized coatings in support of the Air Forces requirement for in-situ microwave traveling wave testing. The offered design specifically addresses the need for high-fidelity measurements of aircraft surface coatings in a field environment and is based on a wide-band probe technology that can operate over the whole 2 to 18 ...
Cervical Cancer is the second most common cancer among women worldwide and the leading cause of cancer mortality of women in developing countries. If detected early and treated adequately, cervical cancer can be virtually prevented. Cervical precursor lesions and invasive cancer exhibit certain morphologic features that can be identified during a visual inspection exam. Digital imaging technologies allow us to assist the physician with a Computer-Aided Diagnosis (CAD) system. In colposcopy, epithelium that turns white after application of acetic acid is called acetowhite epithelium. Acetowhite epithelium is one of the major diagnostic features observed in detecting cancer and pre-cancerous regions. Automatic extraction of acetowhite regions from cervical images has been a challenging task due to specular reflection, various illumination conditions, and most importantly, large intra-patient variation. This paper presents a multi-step acetowhite region detection system to analyze the acetowhite ...
Specular reflection is what a laser beam does when it bounces off a mirror-its angle coming in equals its angle going out, close to the way a soccer ball bounces. However, a football will have none of this sort of predictability. For punt and kickoff returners, this means the ball may land at their feet and proceed to bounce out of their grasp. Some fumble-it is victims are even asked by coaches to carry the football with them all week, but a better bet, says Gay, is to keep a low center of body mass and hold the ball four- point style: Vectors, torques and techniques triumphing amid all the black-and-blue ...
Specular reflection is what a laser beam does when it bounces off a mirror-its angle coming in equals its angle going out, close to the way a soccer ball bounces. However, a football will have none of this sort of predictability. For punt and kickoff returners, this means the ball may land at their feet and proceed to bounce out of their grasp. Some fumble-it is victims are even asked by coaches to carry the football with them all week, but a better bet, says Gay, is to keep a low center of body mass and hold the ball four- point style: Vectors, torques and techniques triumphing amid all the black-and-blue ...
Lasing relies on light amplification in the active medium of an optical resonator. There are three lasing regimes in the emission from a quantum well coupled to a semiconductor microcavity. Polariton lasing in the strong light-matter coupling regime arises from the stimulated scattering of exciton-polaritons. Photon lasing in the weak coupling regime relies on either of two mechanisms: the stimulated recombination of excitons, or of an electron-hole plasma. So far, only one or two out of these three regimes have been reported for a given structure, independently of the material system studied. Here, we report on all three lasing regimes and provide evidence for a three-threshold behavior in the emission from a photonic trap in a Se/Te-based planar microcavity comprising a single CdSe/(Cd,Mg)Se quantum well. Our work establishes the so far unsettled relation between lasing regimes that differ by their light-matter coupling strength and degree of electron-hole Coulomb correlation. Semiconductor
Atherosclerosis, the major cause of cardiovascular diseases, has been a leading contributor to morbidity and mortality in the United States,1 and it has been on the rise globally.2 The statistics that account for the rise in incidence consequently call for new imaging techniques to advance the research and diagnosis of atherosclerosis. Current imaging methods, such as x-ray angiography, MRI, intravascular ultrasound (IVUS), computed tomography, and optical coherence tomography (OCT) allow exquisite delineation of advanced lesions.3 Notably, MRI can achieve molecular imaging using contrast agents.4,5 Also, by using spectral analysis to identify lesion components, IVUS can perform virtual histology.6-8 Nonetheless, these techniques have not yet reached submicron resolution. As the gold standard, histology provides high performance in biopsy studies, but it is not feasible for live tissue imaging. In addition, with technical advances, fluorescence microscopy with 1- and 2-photon excitation has been ...
Respiratory and heart rates are among the most important physiological parameters used to monitor patients health. It is important to design devices that can measure these parameters without risking or altering the subjects health. In this context, a novel sensing method to monitor simultaneously the heartbeat and respiratory rate signals of patients within an electrically safety environment was developed and tested. An optical fiber-based sensor was used in order to detect two optical phenomena. Photo-plethysmography and the relation between bending radius and attenuation of optical fiber were coupled through a single beam light traveling along this fiber.
Purpose: : in vivo retinal imaging using optical coherence tomography (OCT) employing 1040 nm light for significantly improved visualization of the choroid Methods: : Time-domain and frequency-domain OCT technology using light centered at 1040 nm has been developed for high speed ultrahigh resolution retinal imaging for the first time. Commonly OCT systems for retinal imaging use spectral wavelengths below 930 nm, because of water absorption. Utilizing a light source with a spectrum centred at 1040 nm within the first absorption window has the advantages to significantly reduce OCT signal losses due to absorption and scattering at the melanin rich retinal pigment epithelium (RPE) and deeper layers, therefore enabling significantly deeper penetration into the underlying choriocapillaris and choroid. Furthermore light at 1040 nm is less scattered hence less attenuated by turbid media (e.g. corneal haze and cataract) that often occur in elderly eyes with retinal pathologies, commonly limiting ...
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Jakub Dostaleks research interests include combined aspects of nano-photonics, materials research, and biointerfaces that are attractive for optical sensors and biosensors. Novel optical phenomena associated to surface plasmons - optical resonances with tightly confined electromagnetic field occurring on thin metallic films and metallic nanostructures. Analytical systems enabling interaction analysis and rapid and sensitive detection of molecular and biological species, particularly relevant to medical diagnostics and food control ...
Development of new procedures for understanding material properties on the atomic level with a special focus on ultrahigh resolution electron microscopy techniques. In the near future, the life sciences will be added as the first new field of application. Furthermore, we enable researchers from science and industry to use our instruments and methods, supported by our experts, and aim to establish a national user facility for the scientific community.. ...
An introduction to light, optical phenomena, and related devices, including some historical perspective; classical and modern models of light; light and color in nature, and vision; the geometrical optics of lenses, mirrors, and related devices; the physical optics of interference and diffraction; spectroscopy and polarization; lasers, and holography. Without assuming either prior knowledge of physics or heavier mathematics, we will develop models and explore them in intermixed lecture/discussion and experiment/demonstration modes ...
The title says it all: Blue + Black = Yellow. Carlos Cruz-Diez holds up a geometric -abstraction he made in 1963, a weaving of black-and-blue lines on paper.. What do you see? Yellow. Yet there is no yellow in this work, none at all. You see yellow because, when the blue hits the black, that is the effect on the retina, Cruz-Diez explains, pointing to what looks like a pattern in shades of intense lemon. Its an optical effect known as simultaneous contrast. One of the artists early achievements was to isolate the phenomenon on the easel, as he did in this piece, whose full title is Induction chromatique: Bleu + noire = jaune. He says, I was able then to move past a simple demonstration of an optical phenomenon and incorporate it into my artistic discourse.. A pivotal figure in Latin American abstraction, Cruz-Diez creates works of vibrating color, using cardboard or corrugated aluminum and strips of acrylic. Less an actual painting than a pictorial system of colors and shapes, a ...
The Phoenix Lights (sometimes referred to as the lights over Phoenix) were a series of widely sighted optical phenomena (generally unidentified flying...
TheInfoList.com - (Airglow) AIRGLOW (also called NIGHTGLOW) is a faint emission of light by a planetary atmosphere . In the case of Earths atmosphere this optical phenomenon causes the night sky to never be completely dark, even after the effects of starlight and diffused sunlight from the far side are removed
The Xie lab has made advances in room-temperature single-molecule spectroscopy in order to investigate molecular interactions and chemical reactions on a detailed level. Their research has two objectives: (1) to understand conformational and chemical dynamics of biomolecules such as enzymes by single-molecule spectroscopic studies; (2) to image macromolecules and to probe their chemical activities on biological membranes and in living cells with near-field and nonlinear optical microscopy.
Resonant nonlinear optical microscopy. Presented at: International School of Physics Enrico Fermi, Varenna, Italy, 12-22 July 2011. Published in: Pavone, F. S., So, P. T. C. and French, P. M. W. eds. Microscopy Applied to biophotonics: Proceedings of the International School of Physics Enrico Fermi, Course 181. Proceedings of the International School of Physics Enrico Fermi , vol. 181. Amsterdam: IOS Press; Ohmsha; 1999, pp. 141-173. 10.3254/978-1-61499-413-8-141 ...
42.00251 -83.30887 NEWPORT, Mich. - Fermi 2 experienced unexplained turbine vibrations as its nuclear reactor was being shut down Saturday for the plants latest refueling and maintenance outage.. DTE Energy, told the Nuclear Regulatory Commission high vibration levels came from a main turbine about 1:46 a.m., according to a report posted on the agencys Web site Monday.. The plant was shut down immediately by an operator who stepped in and performed a manual scram rather than continue with a gradual shutdown.. Manual scrams are required by safety procedures when vibrations of a certain magnitude are detected, NRC spokesman Viktoria Mitlyng said.. The cause is being investigated. The utility plans to keep Fermi 2 offline for 30 days.. The utility has augmented its work force with about 1,000 contractors to replace about a quarter of the plants reactor core with new fuel assemblies while also performing 2,000 inspections and other activities, DTE spokesman John Austerberry said.. Nuclear ...
An adhesive adapted with particular optical properties, and its use to couple a substrate to a substrate holder during substrate processing are disclosed. After processing the substrate, the optical properties of the adhesive may be exploited to locate and/or remove adhesive residue that may be present on the substrate.
NIST scientists have devised and modeled a unique optical method of sorting microscopic and nanoscopic particles by size, with a resolution as fine as 1 nm for particles of similar composition.
Article Electrical and optical properties of p-type conductive NiO-Pt thin films. In this work, we deposited NiO-Pt composite films with varying Pt content in the range of 0-25.83 at.%. An ultra high electrical resistivity (ρ) is obtained and cannot ...
I know that a function is only periodic if it repeats its value in a given interval, so f(x)=f(x+D) where D is some distance down the x axis where f(x) has the same value as f(x+D), and I know what a graph of x^2 looks like in my head but it does not repeat... How is this function periodic? Sketching it is the first step of my homework problem. It appears to me that the interval given -a,x,a is supposed to be the interval of which it repeats, so it would repeat -3a,x,a and a,x,3a. Is the problem given to us missing other conditions? A sketch or some ideas is helpful thanks in advance ...
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View Notes - fulltext37 from SPECTOGRAP 545 at AIB College of Business. Nano- and Microparticles of Organic Fluorescent Dyes Self-organization and Optical Properties SUZANNE FERY-FORGUES, MOUHAMMAD
Article Monitoring ecosystem optical properties with the UniSpec-SC. Understanding patterns of ecosystem properties is important if we are to effectively monitor ecosystem change due to a variety of reasons (e.g. global changes, human management). Re...
Author: Lu, J. W. et al.; Genre: Journal Article; Published in Print: 2011; Title: Changes in the optical properties of benzo[a]pyrene-coated aerosols upon heterogeneous reactions with NO2 and NO3
the nightmare plastic column of foetid black iridescence oozed tightly onward through its fifteen-foot sinus; gathering unholy speed and driving before it a spiral, re-thickening cloud of the pallid abyss-vapour. It was a terrible, indescribable thing vaster than any subway train-a shapeless congeries of protoplasmic bubbles, faintly self-luminous, and with myriads of temporary eyes forming and unforming as pustules ...
An exceptionally elegant eye makeup innovation, this ultra fine, loose powder, with a touch of iridescence, can be applied as an eyeliner using the wand applicator or applied as an eyeshadow using the brush.
A new optical microscope uses holographic techniques to stimulate multiple cells simultaneously and monitor cell activity after stimulation. Developed
Minimalization of the sample volumes used for light interaction so that better spatial resolution and faster acquisition of data in analytical optical methods is achieved - e.g. for monitoring of biochemical processes in droplets. This also contributes to the imaging techniques such as holographic fiber endoscopy. ...
Well be glad to test your samples for optical properties: haze, clarity, gloss, etc.. Zebedee® offers a wide range of testing (not just optical), please contact us with your specifications. ...